If you can't grab that file the dumpel.exe, a resource kit utility, may help you if you can schedule the dump and then have Netbackup come in and grab the dump for archive.
Write a batch and put it in a scheduled task. It sounds counterintuitive when you are paying all of this money for an enterprise class backup solution, but it is a common practice to dump out what you need and then have your backup software grab the files.